Recent content by itchy8me

so i have a question about calculating the RMS value of a fully rectified clamped sinusoid. Assumptions: The top of the waveform = U It is clamped at 0.5 U I can calculate the RMS value by adding the 3 components of the wave, ei. @ 0.5U ω = π/6 & 5π/6 which forms a block and two side...

You are correct. This is a very good solution and approaches beyond measurable precision. esspecially with the help of a computer. thank you :)

That being so would beg the question if math as a language is complete, my guess is not and therefore no harm done ;) I'm however a very stubborn person and i will try and solve this until there are no more trees left. edit: by the way when you say most "real world applications" i take it your...

my appreciation of math will come to an end if there is no clean solution. I'm wondering now if it cannot be solved with limits and surface areas.

true , i forgot i simplified it to this https://www.physicsforums.com/showthread.php?t=389968 . Isolating was indeed the problem. What i however meant is that they are indeed both unknowns that cannot be solved for .. at this point in the equation. iterating would be feasible, but surely there...

yup that's what i mean, and we have 2 unknowns there, "a" and "d".

this was my first assessment, it's correct, however "a" is proving to be quite a *****

we want to calculate d for any belt length. Your quite correct though, deriving a solvable equation is proving to be killing a lot of trees here. I'm going to post what i have done once i either give up or find the solution. I'm working from the same perspective though, equating intersections...

okay, i guess that's a good assumption(approximation) if the sizes are not that different, what happens though when they are very different and close to each other?

looks good to me. except i don't quite get what R \pi \ \& \ r \pi in the equation of P are? they're supposed to be the length's of the belt on the circumference of the pulley's right?... shouldn't these terms be fractions of the form: 2 \pi R\frac{180 + 2 \alpha}{360} \ \& \ 2 \pi r\frac{180 -...

hi there, i have two pulleys of known radii. i also have a belt of known length (radii). I need to find the distance between the two pulley centres so that the belt raps neatly around both pulleys. I've had a go at it for a while now and the furthest i have come is: 1) to make an...

mmm.. i guess i'll have to go at the problem another way. thanks for the help, i probably would have stared at this for hours before moving on.

hi there. I have an equation i derived from a "belt problem" (i actually don't know if it's correctly derived yet). However i am now stuck and cannot find the next step to solving it, I'm trying to solve for alpha. The equation is: \frac{1}{\alpha} * \left(\frac{4}{cos(\alpha)} + 9,5\right) =...

brilliant! using the coefficient 1. damn that's a sneaky one. thanks guys and girls ;) ! :-D

so any hints in how i would do it with integration by parts alone? :-p